Home / 3,865.12-5,795.74-1,890.90

Finding the Fourth Proportional to 3,865.12, 5,795.74 and 1,890.90

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Solution

The fourth proportional to 3,865.12, 5,795.74 and 1,890.90 is: 2,835.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.12 : 5,795.74 = 1,890.90 : x
  2. Step 2: Convert to fraction form
    3,865.12/5,795.74 = 1,890.90/x
  3. Step 3: Cross multiply
    3,865.12x = 5,795.74 × 1,890.90
  4. Step 4: Simplify right side
    3,865.12x = 10,959,155.31
  5. Step 5: Solve for x
    x = 10,959,155.31/3,865.12
  6. Step 6: Final answer
    x = 2,835.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.